| Rank | Abbreviation | Meaning |
|---|
| ***** | NBSA | Normalized Body Surface Area
| |
| ***** | NBSA | Nickel-Based Superalloy
| |
| ***** | NBSA | Native Bovine Serum Albumin
| |
| ***** | NBSA | Network Business System Architecture
| |
| ***** | NBSA | National Biodiversity Spatial Assessment
| |
| ***** | NBSA | Netherlands Bank of South Africa
| |
| ***** | NBSA | National Border Security Agency
| |
| ***** | NBSA | National Black Student Association
| |
| ***** | NBSA | Nurses Board of South Australia
| |
| **** | NBSA | Norfolk Billiards and Snooker Association
| |
| **** | NBSA | Northeastern Black Student Association
| |
| **** | NBSA | Northern Border Senior Access
| |
| **** | NBSA | Nepal Blind Support Association
| |
| **** | NBSA | New Brunswick Sailing Association
| |
| **** | NBSA | Northport Bay Sailing Association
| |
| **** | NBSA | North Bay Senior Alliance
| |
| *** | NBSA | National Building and Surveying Alliance
| |
| *** | NBSA | New Brunswick Student Alliance
| |
| *** | NBSA | Newark Bay Study Area
| |
| *** | NBSA | Newcastle Business School Alain
| |
| *** | NBSA | New Brunswick Student Association
| |